xbps-src: enable CCACHE_COMPRESS to save space
xbps-src: enable CCACHE_COMPRESS to save space

Using CCACHE_COMPRESS is transparent. It compresses manifests and object
files in the cache but can read both, compressed and uncompress files.

NeoChontrix/void-packages,floGik/void-packages,necrophcodr/void-packages,floGik/void-packages,coredumb/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,floGik/void-packages,floGik/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,coredumb/void-packages,floGik/void-packages,coredumb/void-packages,coredumb/void-packages,necrophcodr/void-packages,floGik/void-packages,NeoChontrix/void-packages,coredumb/void-packages,coredumb/void-packages